diff --git a/samplebrain/Makefile.in b/samplebrain/Makefile.in
index a9fb82b..ae8125d 100644
--- a/samplebrain/Makefile.in
+++ b/samplebrain/Makefile.in
@@ -13,8 +13,8 @@ SRCS :=   	src/fft.cpp \
 
 TARGET_SRCS    := src/main.cpp
 
-# for the minute, go out and up to link to the vision lib
-CCFLAGS = @CFLAGS@ -std=c++11 -ffast-math -Wno-unused -Isrc
+# @CFLAGS@
+CCFLAGS = -Ofast -march=native -mtune=native -std=c++11 -ffast-math -Wno-unused -Isrc
 LDFLAGS = @LDFLAGS@
 LIBS    = @LIBS@
 
diff --git a/samplebrain/configure b/samplebrain/configure
index 916006f..44a323a 100755
--- a/samplebrain/configure
+++ b/samplebrain/configure
@@ -2036,6 +2036,7 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
+: ${CXXFLAGS="-O3"}
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
diff --git a/samplebrain/configure.ac b/samplebrain/configure.ac
index f5ccea2..93dfa1a 100644
--- a/samplebrain/configure.ac
+++ b/samplebrain/configure.ac
@@ -1,4 +1,5 @@
 AC_INIT(samplebrain, version-0.1)
+: ${CXXFLAGS="-O3"}
 AC_PROG_CC
 
 AC_CHECK_LIB(m, cos)
diff --git a/samplebrain/dist.sh b/samplebrain/dist.sh
index 96f6a72..9250258 100755
--- a/samplebrain/dist.sh
+++ b/samplebrain/dist.sh
@@ -4,4 +4,4 @@ make distclean
 autoheader
 # build configure
 autoconf configure.ac > configure
-./configure CXX=g++-4.7 CCFLAGS=-O3
+./configure 'CXX=g++-4.7' 'CXXFLAGS=-O3'
diff --git a/samplebrain/src/block.cpp b/samplebrain/src/block.cpp
index 73ac179..b2855ac 100644
--- a/samplebrain/src/block.cpp
+++ b/samplebrain/src/block.cpp
@@ -66,6 +66,8 @@ void block::init_fft(u32 block_size)
     }
 }
 
+#define FFT_BIAS 200
+
 double block::compare(const block &other, float ratio) const {
     double mfcc_acc=0;
     double fft_acc=0;
@@ -74,7 +76,7 @@ double block::compare(const block &other, float ratio) const {
         for (u32 i=0; i<m_fft.get_length(); ++i) {
             fft_acc+=(m_fft[i]-other.m_fft[i]) * (m_fft[i]-other.m_fft[i]);
         }
-        return fft_acc/(float)m_fft.get_length();
+        return (fft_acc/(float)m_fft.get_length())*FFT_BIAS;
     }
 
     if (ratio==1) {
@@ -92,7 +94,7 @@ double block::compare(const block &other, float ratio) const {
         mfcc_acc+=(m_mfcc[i]-other.m_mfcc[i]) * (m_mfcc[i]-other.m_mfcc[i]);
     }
 
-    return (fft_acc/(float)m_fft.get_length())*(1-ratio) +
+    return (fft_acc/(float)m_fft.get_length())*(1-ratio)*FFT_BIAS +
         (mfcc_acc/(float)MFCC_FILTERS)*ratio;
 }
 
diff --git a/samplebrain/src/brain.cpp b/samplebrain/src/brain.cpp
index 8487c83..e907609 100644
--- a/samplebrain/src/brain.cpp
+++ b/samplebrain/src/brain.cpp
@@ -91,7 +91,7 @@ void brain::resynth(const string &filename, const brain &other, float ratio){
     u32 pos = 0;
     u32 count = 0;
     cerr<<other.m_blocks.size()<<" brain blocks..."<<endl;
-
+    cerr<<endl;
     for (vector<block>::iterator i=m_blocks.begin(); i!=m_blocks.end(); ++i) {
         cerr<<'\r';
         cerr<<"searching: "<<count/float(m_blocks.size())*100;
diff --git a/samplebrain/src/main.cpp b/samplebrain/src/main.cpp
index a94974e..2d8199d 100644
--- a/samplebrain/src/main.cpp
+++ b/samplebrain/src/main.cpp
@@ -53,22 +53,27 @@ void run_audio(void* c, unsigned int frames) {
 
 int main(int argc, char *argv[])
 {
-    unit_test();
+//    unit_test();
 
     cerr<<"starting"<<endl;
     brain source, target;
 //    source.load_sound("../sound/source/shostakovich6.wav");
     source.load_sound("../sound/source/808.wav");
-    source.load_sound("../sound/source/full.wav");
+    source.load_sound("../sound/source/joey.wav");
+    source.load_sound("../sound/source/pw2.wav");
+    source.load_sound("../sound/source/pw3.wav");
+    source.load_sound("../sound/source/claps.wav");
+    source.load_sound("../sound/source/eagle.wav");
 
-//    target.load_sound("../sound/source/sb-left.wav");
+    //target.load_sound("../sound/source/sb-left.wav");
     target.load_sound("../sound/source/apache.wav");
     cerr<<"loaded sounds"<<endl;
-
-    u32 len=1024;
+    cerr<<endl;
+    u32 len=3000;
     source.init(len,len-len,50);
-    target.init(len,len-len/4,50);
+    target.init(len,len-len/8,50);
     cerr<<"ready..."<<endl;
+    cerr<<"we have "<<source.get_num_blocks()<<" brain blocks ("<<source.get_num_blocks()*len/44100.0<<" secs)"<<endl<<endl;
 
     a = new audio_device("samplebrain",44100,2048);
 
diff --git a/samplebrain/src/renderer.cpp b/samplebrain/src/renderer.cpp
index 29f7f01..db1da7f 100644
--- a/samplebrain/src/renderer.cpp
+++ b/samplebrain/src/renderer.cpp
@@ -12,12 +12,18 @@ void renderer::init(brain &source, brain &target, float ratio) {
     m_ratio = ratio;
 }
 
+static int ratio_time = 0;
+
 void renderer::process(u32 nframes, float *buf) {
     // get blocks from source for the current buffer
     u32 tgt_shift = m_target.get_block_size()-m_target.get_overlap();
     u32 tgt_start = m_render_time/(float)tgt_shift;
     u32 tgt_end = (m_render_time+nframes)/(float)tgt_shift;
 
+    m_ratio = sin((ratio_time++)*0.01)*0.5+0.5;
+    cerr<<'\r';
+    cerr<<m_ratio;
+
     if (tgt_end>=m_target.get_num_blocks()) {
         m_render_time=0;
         m_render_blocks.clear();